Some issues with unit tests in quizaccess_seb were identified as part of  MDL-68654

https://tracker.moodle.org/browse/MDL-68654?focusedCommentId=796785&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-796785

1) Forcing $this->resetAfterTest() and generator->create_course() in quizaccess_seb_testcase->setUp(). That code should be the nearest possible to the unit test. Right now, every unit test that we want to write will force, always, a database reset and the creation of a course, when we may be, perfectly, covering some method not requiring any of them.

2) Creating a parent quizaccess_seb_testcase itself, without any unit test (test_xxx) method... is prone to errors. If tomorrow anybody wants to create a unit test and adds it to that class... those tests will be executed X times, child classes will run it again and again. That should be a helper/fixtures or anything else, not a testcase.

3) BTW, also, we discovered yesterday... that the path for all those tests are really wrong (tests/phpunit). "phpunit" is not valid at all. Not sure if this has been reported in another issue, I just remember it because yesterday we were all surprised that we missed that detail.